CN1964477A - Multimedia signal receiving apparatus and control method thereof - Google Patents
Multimedia signal receiving apparatus and control method thereof Download PDFInfo
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- CN1964477A CN1964477A CNA2006101447075A CN200610144707A CN1964477A CN 1964477 A CN1964477 A CN 1964477A CN A2006101447075 A CNA2006101447075 A CN A2006101447075A CN 200610144707 A CN200610144707 A CN 200610144707A CN 1964477 A CN1964477 A CN 1964477A
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- decruption key
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
- H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4344—Remultiplexing of multiplex streams, e.g. by modifying time stamps or remapping the packet identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
A multimedia signal receiving apparatus and a control method thereof are provided for easily storing and/or transmitting an encrypted AV signal together with a decryption key without decrypting the encrypted AV signal. The multimedia signal receiving apparatus includes: an interface which receives a multimedia signal containing an encrypted AV signal and packet data, and a decryption key used to decrypt the encrypted audio/video (AV) signal; a packet processor which generates packet data containing information relating to the decryption key; and a controller which controls the packet processor to generate the packet data containing the information relating to the decryption key when the decryption key is set.
Description
This application requires the priority of the korean patent application that proposes in Korea S Department of Intellectual Property on November 9th, 2005 10-2005-0107236 number, and the open of this application all incorporated at this by reference.
Technical field
Apparatus and method according to the invention relates to multimedia signal receiving apparatus and control method thereof, relate in particular to and be used for receiving the multimedia signal receiving apparatus of decruption key comprise the multi-media signal of encrypted audio (AV) signal and grouped data and to be used to decipher the AV signal of this encryption, and the control method of this multimedia signal receiving apparatus.
Background technology
Fast development along with the digital broadcasting technology, existence is to receiving various multi-media signals simultaneously, and processing and demonstration are from the need for equipment of the multi-media signal of the various media such as IEEE 1394 equipment, USB (USB) memory, national renewable safety system (NRSS) and personal video recorder (PVR).Be digitized because carry the multi-media signal of AV signal and grouped data, so along with the development of Internet, multi-media signal is subject to bootlegging.Therefore, the needs that increase progressively day by day that exist limited reception and prevent to duplicate.
In response to this, for the AV signal that comprises vision signal and audio signal, the copyright protection responsibility by law-making stipulation to adjust multi-media signal supplier and multi-media signal recipient.In addition, also carried out more effort so that prevent duplicating of AV signal.Yet, disadvantageously, stop the AV signal replication also to hinder the user and duplicate this AV signal so that watch this AV signal continuously or use other medium to watch this AV signal.
The multimedia signal receiving apparatus of correlative technology field is when receiving the AV signal that is used to prevent the encryption of duplicating, and the cycle is upgraded decruption key so that decipher the AV signal of this encryption.Next, this multimedia signal receiving apparatus so that store this AV signal, is encrypted the AV signal of having deciphered according to its cryptography based on the AV signal of this decruption key enabling decryption of encrypted then once more.Thereby, because according to different scheme storage multi-media signals,, and therefore increased production cost so the multimedia signal receiving apparatus of correlative technology field needs the system of high standard (specification).
The AV signal of the multimedia signal receiving apparatus enabling decryption of encrypted of another correlative technology field, and store the AV signal of this deciphering and do not use itself cryptography.The multimedia signal receiving apparatus of this correlative technology field has such shortcoming, that is, store because of this multi-media signal not encrypted, so unwarranted people can duplicate this multi-media signal.
Summary of the invention
The invention provides the multimedia signal receiving apparatus of the AV signal of AV signal non-decrypting this encryption that a kind of easy storage and/or transmission encrypt together with decruption key, and control method.
According to an aspect of the present invention, provide a kind of multimedia signal receiving apparatus, having comprised: interface, be used for receiving and comprise the multi-media signal of encrypted audio (AV) signal and grouped data, and the decruption key that is used to decipher the AV signal of this encryption; Packet handler is used to generate and comprises the packets of information data relevant with this decruption key; And controller, being used to control this packet handler, when with box lunch this decruption key being set, generation comprises the packets of information data relevant with this decruption key.
According to an aspect of the present invention, described packet handler generates described grouped data by will the information relevant with decruption key being inserted in the grouped data that receives by described interface.
According to an aspect of the present invention, described packet handler generates and comprises the grouped data information relevant with decruption key, independent.
According to an aspect of the present invention, described grouped data comprises the privately owned table that wherein will insert private data, and described packet handler generates the grouped data that comprises described decruption key by will the information relevant with this decruption key being inserted in the privately owned table.
According to an aspect of the present invention, described packet handler is inserted into described private data in the described privately owned table based on the appendix H of the 13818-1 of International Organization for Standardization/International Electrotechnical Commission (IEC) (IEC) standard.
According to an aspect of the present invention, described privately owned table comprises segment table, and described packet handler will be distinguished out the decruption key indication information of decruption key and is inserted in the described segment table with the corresponding decryption key information of decruption key value from other data.
According to an aspect of the present invention, dispose described segment table according to ISO/IEC 13818-1 standard.
According to an aspect of the present invention, described segment table comprises at least one in Program Association Table (PAT), Program Map Table (PMT) and the main guide tab (MGT).
According to an aspect of the present invention, described privately owned table is in the leader of described multi-media signal.
According to an aspect of the present invention, described privately owned table is in the adaptation fields of carrying timer reference of programs (PCR), and described packet handler will be distinguished out the decruption key indication information of decruption key and is inserted in the described privately owned table with the corresponding decryption key information of decruption key value from other data.
According to an aspect of the present invention, described decruption key was upgraded by the external equipment cycle.
According to an aspect of the present invention, signal processor, it comprises the demultiplexer that described multi-media signal is separated into AV signal and grouped data; Wherein, when receiving the multi-media signal of the AV signal that comprises encryption and grouped data by described interface, described controller is controlled described demultiplexer so that isolate AV signal and grouped data.
According to an aspect of the present invention, described signal processor also comprises the multiplexer of synthetic AV signal and grouped data, wherein, when having generated when wherein having inserted the packets of information data relevant with decruption key, this multiplexer controlled by described controller so that the synthetic grouped data that is generated and the AV signal of encryption.
According to an aspect of the present invention, described signal processor also comprises the decrypted signal device, its based on be inserted in the described grouped data, the information relevant with decruption key deciphers the AV signal of this encryption.
According to an aspect of the present invention, described signal processor also comprises the decruption key extractor, it extracts the information relevant with decruption key from the grouped data of having inserted decruption key at described packet handler, and the information of being extracted is sent to described decrypted signal device.
According to an aspect of the present invention, described controller is stored in the synthetic grouped data in described signal processor place and the AV signal of encryption at least one of internal storage or External memory equipment.
According to an aspect of the present invention, multimedia signal receiving apparatus also comprises display, and it comes display image based on the AV signal in the deciphering of decrypted signal device place.
According to an aspect of the present invention, described grouped data comprises system information (SI).
According to an aspect of the present invention, described SI comprises the program standardize information (PSI) according to ISO/IEC 13818-1 standard, and according to the program and the system information protocol (PSIP) of the 65/B of Advanced Television Systems Committee (ATSC) standard.
According to another aspect of the present invention, provide a kind of control method of multimedia signal receiving apparatus, having comprised: received the multi-media signal that comprises encrypted audio (AV) signal and grouped data; Decruption key is set so that the AV signal that deciphering is encrypted; And generation comprises the packets of information data relevant with this decruption key.
According to an aspect of the present invention, described generation grouped data comprises: the information relevant with decruption key is inserted in the described grouped data.
According to an aspect of the present invention, described generation grouped data comprises: generate and comprise the grouped data information relevant with this decruption key, independent.
According to an aspect of the present invention, described grouped data comprises the privately owned table that wherein will insert private data, and described generation comprises the packets of information data relevant with decruption key and comprises: will relevant information insert in the described privately owned table with this decruption key.
According to an aspect of the present invention, described packet handler is inserted into described private data in the described privately owned table based on the appendix H in the 13818-1 of International Organization for Standardization/International Electrotechnical Commission (IEC) (IEC) standard.
According to an aspect of the present invention, described privately owned table comprises segment table, and described generation comprises the packets of information data relevant with decruption key and comprises: will distinguish out the decruption key indication information of decruption key and be inserted in the segment table with the corresponding decryption key information of decruption key value from other data.
According to an aspect of the present invention, dispose described segment table according to ISO/IEC 13818-1 standard.
According to an aspect of the present invention, described privately owned table is in the leader of multi-media signal.
According to an aspect of the present invention, described privately owned table is in the adaptation fields of carrying timer reference of programs (PCR), and described generation comprises the packets of information data relevant with decruption key and comprises: will distinguish out the decruption key indication information of decruption key and be inserted in the described privately owned table with the corresponding decryption key information of decruption key value from other data.
According to an aspect of the present invention, this control method also comprises: upgrade described decruption key by the external equipment cycle.
Description of drawings
By below in conjunction with the description of accompanying drawing to example embodiment, above-mentioned and/or others of the present invention will become obviously and be more readily understood, in the accompanying drawings:
Fig. 1 is the block diagram of the multimedia signal receiving apparatus of example embodiment according to the present invention;
Fig. 2 A and 2B illustrate the figure that according to example embodiment of the present invention, has wherein inserted the table of decruption key;
Fig. 3 A and 3B illustrate the figure that according to replacement example embodiment of the present invention, has wherein inserted the table of decruption key; And
Fig. 4 is the flow chart of explanation operation of the multimedia signal receiving apparatus of example embodiment according to the present invention.
Embodiment
To explain example embodiment of the present invention now, the example of the embodiment of the invention has been described in the accompanying drawings, wherein in the accompanying drawings, similarly Reference numeral is indicated similar unit all the time.Be described below these example embodiment so that by illustrating the present invention with reference to the accompanying drawings.
As shown in Figure 1, the multimedia signal receiving apparatus of example embodiment comprises according to the present invention: interface 10 is used to receive the AV signal that comprises encryption and the multi-media signal and the decruption key of grouped data; Packet handler 30 is used to generate and comprises the packets of information data relevant with decruption key; And controller 90, be used to control these assemblies.Multimedia signal receiving apparatus can also comprise signal processor 50, memory device 80 and display 70.
Import from external equipment under the situation of multi-media signal or decruption key, interface 10 can comprise the input terminal (not shown) that is used for from external equipment multimedia signal receiving or decruption key.Particularly, interface 10 can comprise the terminal that is used for multimedia signal receiving, and be used for by with the terminal of communicating by letter with the receiving and deciphering key that ply-yarn drill (cable card) or smart card are arranged.In addition, interface 10 can also comprise and is used for respectively integrated driving electronics (IDE) interface, IEEE 1397 interfaces and the USB interface that communicate with exterior I DE equipment, IEEE 1394 equipment and USB storage.
Herein, decruption key can be periodically for example from having ply-yarn drill or smart card to transmit or being upgraded by them.Interface 10 has has ply-yarn drill or smart card to be connected to its input terminal.Although illustrated that have ply-yarn drill or the smart card that transmit decruption key are external equipments, interface 10 can include ply-yarn drill or smart card therein.
Multi-media signal transmits with the form of transport stream (TS), and this transport stream (TS) is by to the digital AV signal that comprises digital video signal and digital audio and video signals with as the digital data information time division multiplexing of grouped data and packetized.Notice, grouped data comprises system information (SI), this system information comprises the program standardize information (PSI) according to the 13818-1 of International Organization for Standardization/International Electrotechnical Commission (IEC) (IEC) standard, and according to the program and the system information protocol (PSIP) of the 65/B of Advanced Television Systems Committee (ATSC) standard.
The TS that encrypts comprises the AV signal and the unencrypted grouped data of encryption.Grouped data is not encrypted to be because the AV signal can not be used the encrypted packets data decryption.
When having imported decruption key via interface 10, packet handler 30 is inserted into the decruption key that enters in the grouped data of multi-media signal.When doing like this, packet handler 30 can be inserted in the grouped data with the decruption key indication information of difference decruption key and other data and with the corresponding decryption key information of decruption key value.
According to replacement example embodiment of the present invention, when via interface 10 receiving and deciphering keys, packet handler 30 generates and the grouped data new grouped data that be separated, that comprise this decruption key that receives by interface 10.
Signal processor 50 as described below with multimedia signal dispose for can be presented on the display 70, and the multi-media signal after will handling outputs to display 70.Signal processor 50 comprises demultiplexer 51, multiplexer 53, decruption key extractor 55, decrypted signal device 57 and decoder 59.
Demultiplexer 51 is separated into vision signal and audio signal and grouped data in the AV signal with the TS multi-media signal.Next, demultiplexer 51 outputs to multiplexer 53 with the AV signal.At this moment, if necessary, demultiplexer 51 outputs to packet handler 30 with all or part of grouped data.More specifically, under the control of controller 90, in the time of in decruption key will being inserted into the SI table, demultiplexer 51 outputs to packet handler 30 with grouped data, will be described this processing after a while.
When exist surpassing two programs in the AV signal, multiplexer 53 can select the user to want the specific program of storing, and only multiplexed decruption key and multichannel are decomposed needed information.For example, the AV signal carry with corresponding to the relevant AV signal of a plurality of programs of a plurality of virtual channels, promptly, under the situation of the AV signal relevant with 11-3 with number of virtual channel 11-1, the AV signal of storage of channel 11-1 only.
Therefore, multiplexer 53 can be selected and the multiplexed information that only needs.Therefore, in the time will storing multi-media signal or this multi-media signal will be sent to the outside, can reduce memory capacity or transmission capacity.
Simultaneously, under the control of the controller 90 of setting forth after a while, can be stored in the memory device 80 by multiplexer 53 multiplexed multi-media signals.Although Fig. 1 has only illustrated the multiplexed multi-media signal from multiplexer 53 and has been stored in the memory device 80 that be not limited thereto, multiplexed multi-media signal can be stored in internal storage or the External memory equipment.
External memory equipment can be USB memory device, IEEE 1394 memory devices, external fixed disk drive (HDD) or radio receiving-transmitting unit.Externally memory device is under the situation of USB memory device, and multimedia signal receiving apparatus is sent to the USB memory device according to usb protocol with multi-media signal.Externally memory device is under the situation of IEEE 1394 memory devices, and multimedia signal receiving apparatus is sent to IEEE 1394 memory devices according to IEEE 1394 agreements with multi-media signal.Externally memory device is under the situation of HDD, and multimedia signal receiving apparatus is sent to the HDD memory device according to IDE or small computer system interface (SCSI) agreement with multi-media signal.Externally memory device is that multimedia signal receiving apparatus is sent to radio receiving-transmitting unit according to wireless protocols with multi-media signal under the situation of radio receiving-transmitting unit.It is also noted that the multi-media signal that is stored in the memory device can be applied to interface 10 and demultiplexer 51.
Decruption key extractor 55 extracts the information relevant with decruption key from grouped data, this grouped data has the decruption key that is inserted by packet handler 30.And the information of being extracted is offered decrypted signal device 57.Next, decrypted signal device 57 is based on deciphering the AV signal of this encryption from decruption key extractor 55 that provide, relevant with decruption key information.
Decoder 59 decoded packet data and at the AV signal of decrypted signal device 57 places deciphering, and the AV signal and the grouped data of decoding outputed to display 70.
Display 70 is according to the signal display image of managing at signal processor 50 everywhere.Display 70 comprises: the display module (not shown) is used for display image; And the module driver (not shown), be used to handle from the signal of signal processor 50 inputs, and control in case on display module display image.Display module can adopt such as cathode ray tube (CRT), digital light and handle the various display modules (DLP) projecting apparatus, LCD (LCD) and the Plasmia indicating panel (PDP).
At display module is under the situation of DLP projecting apparatus, and module driver can comprise light engine.Under the situation of LCD, module driver can comprise printed circuit board (PCB), and the conversion of signals that is used for feeding from signal processor 50 is data-signal and gating signal.In this respect, display 70 has the corresponding construction according to the module driver of display module type.
Controller 90 control said modules so that the multi-media signal that receives by interface 10 can utilize the decruption key deciphering, and are presented on the display 70.
Particularly, controller 90 control demultiplexers 51 will be so that will be decomposed into vision signal and the audio signal and the grouped data of AV signal via the multi-media signal multichannel that interface 10 receives.When controller 90 wanted the decruption key of the grouped data that will separate at demultiplexer 51 places or this grouped data to insert the SI table, controller 90 was controlled so that only the feeds of data that will insert is given packet handler 30.When controller 90 wants to generate new SI table or the grouped data of separating, rather than when decruption key being inserted in the SI table of the grouped data that receives by interface 10, just the grouped data from demultiplexer 51 needn't be sent to packet handler 30.Hereinafter, will the situation that decruption key is inserted in the existing grouped data be described packet handler 30, to be convenient to understanding of the present invention.
Controller 90 control demultiplexers 51 are presented to multiplexer 53 so that will not be applied to the signal of the multi-media signal of packet handler 30.
When decruption key was set, controller 90 control packet handlers 30 were so that be inserted into the information relevant with decruption key in the grouped data.Because decruption key was upgraded by the external equipment cycle, so controller 90 determines whether decruption key is upgraded by the cycle.When decruption key upgraded based on the cycle, controller 90 control packet handlers 90 were so that be inserted into the information relevant with decruption key in the grouped data.At this moment, when having upgraded decruption key, controller 90 determines to be provided with decruption key.Even when decruption key is not updated, controller 90 can determine that also decruption key was provided with by the cycle, and control packet handler 30 is so that be inserted into the information relevant with decruption key in the grouped data.
When multi-media signal being stored in the memory device 80 according to storage control signal, if upgraded decruption key when multi-media signal being stored in the memory device 80, then controller 90 control packet handlers 30 are so that be inserted into the information relevant with the decruption key that has upgraded in the grouped data.
For example, when the user wants from the 2 pm to the afternoon 4 storages and channel 11 corresponding multi-media signals, 30 cycles of packet handler are inserted into the information relevant with decruption key in the grouped data, and no matter during the memory time of multi-media signal, that is, from the 2 pm to the afternoon during 4 external equipment whether upgraded decruption key.
Grouped data comprises privately owned table.Controller 90 can be controlled packet handler 30, so that the information relevant with decruption key is inserted in the privately owned table.
, think herein, think decruption key is included in the private data as described in the appendix H of ISO/IEC 13818-1 standard.Therefore, for decruption key is inserted in the grouped data, controller 90 control packet handlers 30 are so that as described in the appendix H of ISO/IEC 13818-1 standard, be inserted into private data in the privately owned table of grouped data.More specifically, controller 90 can be controlled packet handler 30, so that as described in the appendix H of ISO/IEC 13818-1 standard, according to the first method that is used for private data is inserted into the TS grouping, be used for private data is inserted into the second method of TS adaptation fields table, be used for that private data is inserted packetizing and flow the third method that (elementary stream) (PES) divides into groups substantially, be used for private data is inserted into the 4th kind of method of descriptor, and be used for private data is inserted at least a in the 5th kind of method of privately owned section (private section), decruption key is inserted in the grouped data.
First method can be used to refer to the group character (PID) that fixes in the Program Map Table (PMT), is used for the private data transmission.The 4th kind of method is inserted into pmt table in the descriptor.It is also noted that the third method is not suitable for the present invention, this is because PES is encrypted.
According to the embodiment of demonstration of the present invention, controller 90 can be controlled packet handler 30, so that according to second method decruption key is inserted in the grouped data.
Specifically, controller 90 can be controlled, so that the information relevant with decruption key is inserted in the leader of grouped data.For example, the privately owned table that wherein inserts the information relevant with decruption key can be in the adaptation fields of grouped data leader, and it uses transport_private_data_flag to carry (carry) timer reference of programs (PCT).Packet handler 30 can insert the decruption key indication information of distinguishing out decruption key from other data and corresponding to the decruption key of decruption key value in privately owned table.In addition, packet handler 30 can insert the information that indicates whether to insert decruption key.
Thus, can decipher this decruption key so that prevent unwarranted Equipment Inspection and the AV signal of this encryption of deciphering according to a certain scheme.
Referring now to Fig. 2 A and 2B,, packet handler 30 will the information relevant with decruption key be inserted among the private_data_byte among the transport_private_data_flag of grouped data of Fig. 2 A.Can insert the information relevant according to the whole bag of tricks with decruption key.For instance, decruption key indication information (the decruption key private data designator among Fig. 2 B) and decryption key information are inserted among the private_data_byte.In this case, best but optionally be, the decruption key indication information is attached at least one place in the front-end and back-end of decruption key, obscure so that prevent decruption key and other private data.
Controller 90 control packet handlers 30, so that will with separate dense relevant information (promptly, decruption key indication information and decryption key information) be inserted among the private_data_byte of transport_private_data_flag of adaptation fields, and will comprise that the feeds of data of the information relevant with decruption key gives multiplexer 53.
According to replacement example embodiment of the present invention, controller 90 control packet handlers 30 are so that as discussed previously being inserted into decruption key in the grouped data according to the 5th kind of method.
More specifically, controller 90 is controlled, so that the information relevant with decruption key is inserted in privately owned section.If generate the private data grouping that comprises the information relevant, then this private data meeting in group and other private data packet collisions with table_id with decruption key by defining new PID.Therefore, by using as ISO/IEC 13818-1 standard described privately owned section, packet handler 30 will the information relevant with decruption key be inserted in the segment table that standardization adopts.
In brief, packet handler 30 is included in the segment table because wherein inserted the privately owned table of the information relevant, so can be distinguished the decruption key indication information of decruption key and other data and be inserted into segment table with the corresponding decryption key information of this decruption key value with being used for decruption key.
Segment table can comprise at least one among PAT, PMT and the MGT.
Hereinafter, illustrating segment table is PAT.The PID of PAT is 0 * 0000, and its table_id is fixed as 0 * 00.According to ISO/IES 13818-1, be 1 o'clock at private_indicator, determine it is privately owned section.Yet in PAT, the bit field of private_indicator unconditionally is set to 0.Using PID and the table_id private_indicator identical to be set to after 1 with PAT, when being 1 when simultaneously PID and table_id are PAT at reproduction period private_indicator, then determine to have the private data (decruption key private_data) of the information relevant, and extract decruption key thus with decruption key.
Referring to Fig. 3 A and 3B, packet handler 30 is adjusted leaders, so as shown in Figure 3A, will remain information and the organization table of 0 * 0000 PID so that in pay(useful) load (promptly, in the data area shown in Fig. 3 B) table_id is 0, and private_indicator is 1.In the example embodiment of replacing, packet handler 30 can will be distinguished out the decruption key indication information of decruption key and be inserted in the privately owned table with the corresponding decryption key information of decruption key value from other data.
Preferred but need not to be, section_syntax_indicator is set to 0 all the time, and this is because it does not meet standard.Section_length is the value that obtains by the size that deducts from total size of privately owned key_private_section till the section_length.
Controller 90 control packet handlers 30, so that information that will be relevant with decruption key (that is, decruption key indication information and decryption key information) is inserted in the segment table, and the data that will have the information relevant with decruption key output to multiplexer 53.
When the data that will have the information relevant with decruption key are applied to multiplexer 53, controller 90 control multiplexers 53 so that the synthetic AV signal of encrypting with comprise that this has wherein inserted the grouped data of the data of the information relevant with decruption key.
AV signal and grouped data that controller 90 can will synthesize at multiplexer 53 places according to storage control signal store in the memory device 80.Perhaps, controller 90 can be according to storage control signal, and AV signal and the grouped data that will synthesize at multiplexer 53 places are sent to External memory equipment.
According to the reproducing control signal, the multi-media signal that is stored in the memory device 80 can be outputed on the demultiplexer 51.Demultiplexer 51 is decomposed into video, audio frequency and grouped data with this multi-media signal multichannel.Next, controller 90 is controlled, so as will be the AV signal that decomposes of multichannel and grouped data present in decrypted signal device 57 and the decruption key extractor 55 at least one.Controller 90 these demultiplexers 51 of control extract the needed grouped data of decruption key so that transmit by decruption key extractor 55.Decruption key extractor 55 extracts decruption key by the decruption key insertion method in counter-rotating (reversing) packet handler 30.For example, demultiplexer 51 uses PID and table_id to extract private data for decruption key, and the private data with relevant this decruption key outputs to decruption key extractor 55 then.It is also noted that decruption key extractor 55 may be used for extracting the private data of relevant decruption key from grouped data.
Controller 90 control signal deciphers 57, the AV signal that so that based on the decruption key that extracts at decruption key extractor 55 places, deciphering is 51 that present from demultiplexer, have vision signal and audio signal, and the signal of deciphering presented to decoder 59.Controller 90 control decoders 59 are so that the AV signal that decoding is presented.
Referring to Fig. 4, multimedia signal receiving apparatus receives by interface 10 and comprises the AV signal of encryption and the multi-media signal (S11) of grouped data.The needed decruption key of AV signal that multimedia signal receiving apparatus is encrypted from the external equipment receiving and deciphering, and store the decruption key (S13) that is received.Decruption key was upgraded by the external equipment cycle.It is also noted that operation S13 may be before the operation S11 or after operation S11.Particularly, because decruption key was upgraded by the cycle,, can whenever carry out the operating period in Fig. 4 the operation S13 of decruption key so being set.
Be separated into video and the audio frequency and the grouped data (S15) of AV signal at demultiplexer 51 places by the multi-media signal of interface 10 receptions.All or part of grouped data is applied to packet handler 30 to be used for the insertion of decruption key.In contrast, as mentioned above, the grouped data that receives by interface 10 can not be applied to packet handler 30.In this case, packet handler 30 generates and comprises the packets of information data (S17) relevant with decruption key.In example embodiment of the present invention, packet handler 30 will be distinguished out the decruption key indication information of decruption key and be inserted in the privately owned table with the corresponding decryption key information of decruption key value from other data, inserted the information relevant with decruption key in this privately owned table.In replacement example embodiment of the present invention, packet handler 30 generates new grouped data, and it has the privately owned table (SI table) that comprises the information relevant with decruption key.Illustrated already above and how the information relevant with decruption key has been inserted in the privately owned table.Therefore, for the sake of brevity, describing in further detail it will be omitted.
To have by packet handler 30 and be applied to multiplexer 53 to the grouped data of the privately owned table that has wherein inserted the information relevant with decruption key.Multiplexer 53 regenerates multi-media signal (S19) by synthetic grouped data and AV signal.Under the control of controller 90, the multi-media signal that generates at multiplexer 53 places is stored in (S21) in memory device 80 or the internal storage.
For multimedia rendering signal (S22), the multi-media signal that controller 90 will be stored in the memory device 80 is fed to demultiplexer 51.Demultiplexer 51 is separated into multi-media signal vision signal and the audio signal and the grouped data (S23) of the AV signal of encryption.Decruption key extractor 55 by counter-rotating packet handler 30 places insert decruption key method, from the grouped data of separating, extract decruption key (S25) by demultiplexer 51.Next, decrypted signal device 57 comes the AV signal of enabling decryption of encrypted based on the decruption key that extracts at decruption key extractor 55 places.The signal of deciphering at decrypted signal device 57 places is decoded, is treated to by decoder 59 and can be presented at (S29) on the display 70 in demonstration on the display 70 and as image.In addition, by loud speaker (not shown) output sound.
Describe multimedia signal receiving apparatus and comprised display 70.Display 70 can embed in the multimedia signal receiving apparatus, perhaps is arranged in the outside discretely.
For example, if multimedia signal receiving apparatus is the set-top box of separating with Digital Television (TV), then multimedia signal receiving apparatus does not comprise display 70.Yet if multimedia signal receiving apparatus is digital TV, multimedia signal receiving apparatus has display 70.
In order to understand, to have described multimedia signal receiving apparatus and comprised multiplexer 53.If do not store isolated at least a portion programme information from multi-media signal, that is to say, if whole multi-media signal that storage receives by interface 10, then need be at multiplexer 53 place's multiplex signals.In this case, in multimedia signal receiving apparatus, can not provide multiplexer 53.
Therefore, insert the information relevant to the multi-media signal that receives by interface 10, and it is stored in the memory device 80, and needn't pass through demultiplexer 51 and multiplexer 53 with decruption key.In order to reproduce the multi-media signal that is stored in the memory device 80, multi-media signal is applied to demultiplexer 51, and carries out multichannel at demultiplexer 51 places and decompose.
Though illustrated that multiplexer 53, demultiplexer 51, decruption key extractor 55, decrypted signal device 57 and decoder 59 are included in the single part of multimedia signal receiving apparatus, the present invention is not subject to this.Multiplexer 53, demultiplexer 51, decruption key extractor 55, decrypted signal device 57 and decoder 59 can be included in the equipment that separates.More specifically, multimedia signal receiving apparatus can comprise multiplexer 53, demultiplexer 51, decruption key extractor 55, decrypted signal device 57 and decoder 59 all, wherein at least one or all do not comprise.
By being appended to the multi-media signal that the AV signal that comprises encryption was stored and transmitted to multi-media signal, store and transmit this multi-media signal by the decruption key that the cycle upgrades.Therefore, might be convenient to transmission, the storage of the encrypted multi-media signal that receives with restriction and reproduce and need not be decrypted.
According to above-mentioned, multimedia signal receiving apparatus and and control method can be so that need not be decrypted together with the AV signal of decruption key storage encryption.
Though illustrated and described example embodiment more of the present invention, but those skilled in the art are to be understood that, can change in these example embodiment and do not deviate from principle of the present invention and spirit, scope of the present invention is defined by claim and their equivalence.
Claims (29)
1, a kind of multimedia signal receiving apparatus comprises:
Interface is used for receiving and comprises the multi-media signal of encrypted audio (AV) signal and grouped data, and the decruption key that is used to decipher the AV signal of this encryption;
Packet handler is used to generate and comprises the packets of information data relevant with this decruption key; And
Controller is used to control this packet handler, and when with box lunch this decruption key being set, generation comprises the packets of information data relevant with this decruption key.
2, multimedia signal receiving apparatus as claimed in claim 1, wherein, described packet handler generates described grouped data by will the information relevant with decruption key being inserted in the grouped data that receives by described interface.
3, multimedia signal receiving apparatus as claimed in claim 1, wherein, described packet handler generates and comprises the grouped data information relevant with decruption key, independent.
4, multimedia signal receiving apparatus as claimed in claim 1, wherein, described grouped data comprises the privately owned table that wherein will insert private data, and described packet handler generates the grouped data that comprises described decruption key by will the information relevant with this decruption key being inserted in the privately owned table.
5, multimedia signal receiving apparatus as claimed in claim 4, wherein, described packet handler is inserted into described private data in the described privately owned table based on the appendix H of the 13818-1 of International Organization for Standardization/International Electrotechnical Commission (IEC) (IEC) standard.
6, multimedia signal receiving apparatus as claimed in claim 4, wherein, described privately owned table comprises segment table, and described packet handler will be distinguished out the decruption key indication information of decruption key and is inserted in the described segment table with the corresponding decryption key information of decruption key value from other data.
7, multimedia signal receiving apparatus as claimed in claim 6 wherein, disposes described segment table according to ISO/IEC 13818-1 standard.
8, multimedia signal receiving apparatus as claimed in claim 6, wherein, described segment table comprises at least one in Program Association Table (PAT), Program Map Table (PMT) and the main guide tab (MGT).
9, multimedia signal receiving apparatus as claimed in claim 4, wherein, described privately owned table is in the leader of described multi-media signal.
10, multimedia signal receiving apparatus as claimed in claim 9, wherein, described privately owned table is in the adaptation fields of carrying timer reference of programs (PCR), and described packet handler will be distinguished out the decruption key indication information of decruption key and is inserted in the described privately owned table with the corresponding decryption key information of decruption key value from other data.
11, multimedia signal receiving apparatus as claimed in claim 4, wherein, described decruption key was upgraded by the external equipment cycle.
12, multimedia signal receiving apparatus as claimed in claim 1 also comprises:
Signal processor, it comprises the demultiplexer that described multi-media signal is separated into AV signal and grouped data;
Wherein, when receiving the multi-media signal of the AV signal that comprises encryption and grouped data by described interface, described controller is controlled described demultiplexer so that isolate AV signal and grouped data.
13, multimedia signal receiving apparatus as claimed in claim 12, wherein, described signal processor also comprises the multiplexer of synthetic AV signal and grouped data,
Wherein, when having generated when wherein having inserted the packets of information data relevant with decruption key, this multiplexer controlled by described controller so that the synthetic grouped data that is generated and the AV signal of encryption.
14, multimedia signal receiving apparatus as claimed in claim 13, wherein, described signal processor also comprises the decrypted signal device, its based on be inserted in the described grouped data, the information relevant with decruption key deciphers the AV signal of this encryption.
15, multimedia signal receiving apparatus as claimed in claim 14, wherein, described signal processor also comprises the decruption key extractor, it extracts the information relevant with decruption key from the grouped data of having inserted decruption key at described packet handler, and the information of being extracted is sent to described decrypted signal device.
16, multimedia signal receiving apparatus as claimed in claim 15, wherein, described controller is stored in the synthetic grouped data in described signal processor place and the AV signal of encryption at least one of internal storage or External memory equipment.
17, multimedia signal receiving apparatus as claimed in claim 16 also comprises: display, it comes display image based on the AV signal in the deciphering of decrypted signal device place.
18, multimedia signal receiving apparatus as claimed in claim 17, wherein, described grouped data comprises system information (SI).
19, multimedia signal receiving apparatus as claimed in claim 18, wherein, described SI comprises the program standardize information (PSI) according to ISO/IEC 13818-1 standard, and according to the program and the system information protocol (PSIP) of the 65/B of Advanced Television Systems Committee (ATSC) standard.
20, a kind of control method of multimedia signal receiving apparatus comprises:
Reception comprises the multi-media signal of encrypted audio (AV) signal and grouped data;
Decruption key is set so that the AV signal that deciphering is encrypted; And
Generation comprises the packets of information data relevant with this decruption key.
21, control method as claimed in claim 20, wherein, described generation grouped data comprises: the information relevant with decruption key is inserted in the described grouped data.
22, control method as claimed in claim 20, wherein, described generation grouped data comprises: generation comprises the grouped data information relevant with this decruption key, independent.
23, control method as claimed in claim 20, wherein, described grouped data comprises the privately owned table that wherein will insert private data, and
Described generation comprises the packets of information data relevant with decruption key and comprises: will relevant information insert in the described privately owned table with this decruption key.
24, control method as claimed in claim 23, wherein, described packet handler is inserted into described private data in the described privately owned table based on the appendix H in the 13818-1 of International Organization for Standardization/International Electrotechnical Commission (IEC) (IEC) standard.
25, control method as claimed in claim 23, wherein, described privately owned table comprises segment table, and
Described generation comprises the packets of information data relevant with decruption key and comprises: will distinguish out the decruption key indication information of decruption key and be inserted in the segment table with the corresponding decryption key information of decruption key value from other data.
26, control method as claimed in claim 25 wherein, disposes described segment table according to ISO/IEC 13818-1 standard.
27, control method as claimed in claim 25, wherein, described privately owned table is in the leader of multi-media signal.
28, control method as claimed in claim 27, wherein, described privately owned table is in the adaptation fields of carrying timer reference of programs (PCR), and described generation comprises the packets of information data relevant with decruption key and comprises: will distinguish out the decruption key indication information of decruption key and be inserted in the described privately owned table with the corresponding decryption key information of decruption key value from other data.
29, control method as claimed in claim 23 also comprises: upgrade described decruption key by the external equipment cycle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050107236A KR20070049926A (en) | 2005-11-09 | 2005-11-09 | Multimedia signal receiving apparatus and control method thereof |
| KR107236/05 | 2005-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1964477A true CN1964477A (en) | 2007-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101447075A Pending CN1964477A (en) | 2005-11-09 | 2006-11-07 | Multimedia signal receiving apparatus and control method thereof |
Country Status (4)
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| US (1) | US20080025508A1 (en) |
| EP (1) | EP1786206A3 (en) |
| KR (1) | KR20070049926A (en) |
| CN (1) | CN1964477A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8213602B2 (en) * | 2006-11-27 | 2012-07-03 | Broadcom Corporation | Method and system for encrypting and decrypting a transport stream using multiple algorithms |
| WO2015102564A1 (en) | 2013-12-30 | 2015-07-09 | Empire Technology Developement LLC | Information rendering scheme |
| EP3032453B1 (en) * | 2014-12-08 | 2019-11-13 | eperi GmbH | Storing data in a server computer with deployable encryption/decryption infrastructure |
| JP6984499B2 (en) * | 2018-03-12 | 2021-12-22 | オムロン株式会社 | FA (Factory Automation) system, controller, and control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1134977A1 (en) * | 2000-03-06 | 2001-09-19 | Irdeto Access B.V. | Method and system for providing copies of scrambled content with unique watermarks, and system for descrambling scrambled content |
| US7570766B2 (en) * | 2002-03-01 | 2009-08-04 | Intel Corporation | Transparently embedding non-compliant data in a data stream |
| US7007170B2 (en) * | 2003-03-18 | 2006-02-28 | Widevine Technologies, Inc. | System, method, and apparatus for securely providing content viewable on a secure device |
| JP4580871B2 (en) * | 2003-12-11 | 2010-11-17 | パナソニック株式会社 | Packet transmitter |
| KR20070046113A (en) * | 2004-08-16 | 2007-05-02 | 마츠시타 덴끼 산교 가부시키가이샤 | Transmitting apparatus and receiving apparatus |
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2005
- 2005-11-09 KR KR1020050107236A patent/KR20070049926A/en not_active Application Discontinuation
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2006
- 2006-11-03 EP EP06123478A patent/EP1786206A3/en not_active Withdrawn
- 2006-11-07 CN CNA2006101447075A patent/CN1964477A/en active Pending
- 2006-11-09 US US11/594,809 patent/US20080025508A1/en not_active Abandoned
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| EP1786206A2 (en) | 2007-05-16 |
| EP1786206A3 (en) | 2009-08-12 |
| KR20070049926A (en) | 2007-05-14 |
| US20080025508A1 (en) | 2008-01-31 |
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